All over the world, Dematteis (Dematteis 
) is a very rare gender-neutral first name. The given name Dematteis is characteristic of Southern Europe, particularly Italy, where it is a very rare epicene name. Predominantly, Dematteis is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Dematteis | France, Argentina, Italy, United States, Uruguay |